Ground-implantable plastic fastener for holding erosion cloth on the ground

Abstract

An implantable polycarbonate fastener for holding erosion cloth on the ground. The fastener has a long vertical leg, a shorter vertical leg extending parallel to the long leg, and a horizontal top leg extending between them. The long vertical leg has a tapered lower end segment with a downwardly and outwardly inclined inside face to cause the long leg to bend away from the shorter vertical leg as it is driven down into the ground, thereby making the implanted fastener harder to pull out of the ground.

I claim: 
     
       1. A thin, flat, substantialy rigid fastener for holding erosion cloth on the ground comprising an elongated first vertical leg having an upper end and a tapered lower end, a second vertical leg extending parallel to said first vertical leg and having an upper end and a lower end, said second vertical leg being substantially shorter than said first vertical leg, and a horizontal top segment joined to and extending between said upper ends of said vertical legs, said vertical legs and said top segment having substantially flat, coplanar, opposite major faces, said vertical legs and said top segment forming an integral one-piece body of high impact plastic, said first vertical leg having an inside longitudinal edge extending between its major faces and facing toward said second leg and an outside longitudinal edge extending between its major faces away from said second leg, said second vertical leg having an inside longitudinal edge extending between its major faces and facing toward said first leg and an outside longitudinal edge extending between its major faces away from said first leg, said top segment having bottom and top edges extending between its major faces, said first and second vertical legs each being substantially thinner between its major faces than across the width of its major faces from its inside edge to its outside edge, said top segment being substantially thinner between its major faces than across the width of its major faces from its bottom edge to its top edge, said tapered lower end of said first vertical leg having its inside face downwardly and outwardly inclined for causing said first vertical leg to bend away from said second vertical leg when the fastener is driven into the ground. 
     
     
       2. A fastener according to claim 1, wherein said high impact plastic is polycarbonate. 
     
     
       3. A fastener according to claim 1, wherein said first vertical leg has a length several times that of said second vertical leg below said top segment. 
     
     
       4. A fastener according to claim 2, wherein said first vertical leg has a length several times that of said second vertical leg below said top segment.